Tag: excretory system in human

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Multiple choice evs - i excretion in living organisms other systems in the body excretory system in human human excretory organs

Average quantity of urea excreted daily humans per day is

  1. 10 - 15 g

  2. 25 - 30 g

  3. 40 - 50 g

  4. 100 - 500 mg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The composition of urine in humans is 95% water, 2.5 % urea and 2.5% other waste. As urea is the major excretory waste humans are considered ureotelic., On an average, 25-30 g of urea is excreted out per day.

So, the correct answer is '25-30 g'.

Multiple choice evs excretion in living organisms other systems in the body excretory system in human human excretory organs

The composition of urine is

  1. 25% water, 2.5 % urea and 2.5% other waste

  2. 95% water, 2.5 % urea and 2.5% other waste

  3. 95% water, 2.5 % urea and 12.5% other waste

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
An adult human on an average excretes 1 to 1.5 liters of urine per day. It is light yellow in color, slightly acidic with a characteristic odor. The composition of urine is 95% water, 2.5 % urea and 2.5% other waste. As urea is the major excretory waste humans are considered ureotelic.
So, the correct answer is '95% water, 2.5 % urea and 2.5% other waste'.
Multiple choice evs excretion in living organisms other systems in the body excretory system in human human excretory organs

The conduction of urine from kidney to the urinary bladder takes place by

  1. Ureter

  2. Urethra

  3. Ovary

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Urine is formed in the kidney. From the kidneys, two tubes called ureter one from each kidney descend to the urinary bladder which conducts urine from the kidneys to the urinary bladder. Urinary bladder receives and stores urine. Later, on stimulus urine is excreted to outside through urethra.

So, the correct answer is 'Ureter'.

Multiple choice evs excretion in living organisms other systems in the body excretory system in human human excretory organs

The tubes which connect the kidney and urinary bladder is known as

  1. Ureter

  2. Kidney

  3. Urethra

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The tubes which connect the kidney and urinary bladder are known as the ureter. Urine is formed in the kidney. From the kidney, urine is propelled into the urinary bladder through the tubes called ureters which are made of smooth muscle fibres.
So, the correct answer is 'Ureter'.
Multiple choice evs excretion in living organisms other systems in the body excretory system in human human excretory organs

Choose the correct answers from the following given.
Which of the following is not an excretory organ?

  1. Spleen

  2. Kidney

  3. Liver

  4. Lungs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Although kidney is the main organs of excretion, several other organs also excrete wastes. They include the liver, skin, and lungs.  Excretory system of a human consists of kidneys, ureters, urinary bladder, and urethra.

So the correct answer is spleen. 

Multiple choice evs - i excretion in living organisms other systems in the body excretory system in human human excretory organs

Choose the correct answers from the following given.
The mammalian excretory system involves all of the following except

  1. reabsorption of high molecular weight proteins from the glomerular filtrate

  2. active transport of chloride ions from the filtrate into the peritubular tissues

  3. release of nitrogenous wastes into the intestines

  4. hormonal control of permeability of walls in various excretory tubules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The excretory system in the mammals deals with the absorption on the basis of the permeability of the system , among all the options given the option other than the function of the excretory system is releasing nitrogenous wastes.

Hence the correct answer is C .

Multiple choice evs - i excretion in living organisms other systems in the body excretory system in human human excretory organs

The primary threshold substance are............... .

  1. Urea and uric acid

  2. Potassium and calcium

  3. Glucose and amino acids

  4. Plasma proteins
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A substance present in blood is filtered through kidneys. Depending on the concentration they are divided as follows, High threshold substances(such as chlorides or glucose), Low threshold substances (such as phosphates or urea). No-threshold substances (such as creatinine sulfate). The primary threshold substance is Urea and uric acid.

So the correct option is 'Urea and uric acid.'

Multiple choice evs excretion in living organisms other systems in the body excretory system in human human excretory organs

Kidneys, skin and lungs are

  1. Excretory organs

  2. Digestive organs

  3. Reproductive organs

  4. None of the above<span>.</span>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The lungs, kidneys, and skin are excretory organs. Excess carbon dioxide is removed from the body through the lungs. Excess urea, water, and salts are removed by the kidneys and leave the body as urine. Excess water and salts also leave the body through the skin through sweat.

So, the correct answer is option A.